• Title/Summary/Keyword: 비구

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Nutrient Transfer in the Application of the Swine Slurry Liquid Fertilizer in Rice Paddy (벼 재배에서 양돈분뇨 액비 시용시 양분이동)

  • Kwon, Soon-Ik;Kim, Kwon-Rae;Kim, Min-Kyeong;Jung, Goo-Bok;Hong, Seung-Gil;Shin, Joong-Du;Park, Woo-Kyun;Seong, Ki-Seog;Lee, Deog-Bae
    • Journal of the Korea Organic Resources Recycling Association
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    • v.18 no.4
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    • pp.77-85
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    • 2010

  • Pig slurry has been considered as environmental waste to be treated in an appropriate manner. Recently, there has been the movement toward reusing the pig slurry as an alternative fertilizer sources for agricultural lands. For instance, SCB(Slurry Composting & Biofiltration) liquid fertilizer has been developed and widely used in Korea. However, the impacts of swine slurry liquid fertilizers on both agricultural environment and crop yield have not been investigated yet. Therefore, the current study was conducted to accumulate the basic data which can be subsequently used to determine appropriate application amount of swine slurry liquid fertilizers (SCB liquid fertilizer and storage liquid fertilizer) as well as the application method for each liquid fertilizer. For this, growth of rice was cultivated under the treatment of SCB liquid fertilizer, storage liquid fertilizer, and chemical fertilizer. Also, control treatment (no fertilizer) was included for comparison and all treatments were conducted in five replication. Rice growth was good with the treatment in the order of chemical fertilizer>storage liquid fertilizer>SCB liquid fertilizer>control and likewise, the yield amount of rice straw was in the same order of rice growth. The rice yield amount appeared to be no difference among the treatment except control which showed the least yield amount. Also there was no difference in nitrogen and phosphorus concentrations in rice among the treatment except control which showed the least concentration.

  • https://doi.org/10.17137/korrae.2010.18.4.77 인용 PDF KSCI

The Effect of Application of Cattle Slurry on Dry Matter Yield and Feed Values of Tall Fescue (Festuca arundinacea Schreb.) in Uncultivated Rice Paddy (유휴 논 토양에서 액상 우분뇨의 시용이 톨 페스큐의 건물수량과 사료가치에 미치는 영향)

  • Jo, Ik-Hwan
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.27 no.1
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    • pp.9-20
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    • 2007

  • This experiment was conducted to investigate effects of application of diluted and undiluted cattle slurry with water on seasonal and annual dry matter yields and feed values of tall fescue in the uncultivated rice paddy and it was compared with chemical fertilizer in order to determine optimal application season and dilution level of cattle slurry. When diluted or undiluted cattle slurry with water was applied to uncultivated rice paddy, annual dry matter yields showed 11.31 to 14.81 ton DM/ha (average 13.13 ton DM/ha) for diluted and 10.57 to 12.51 ton DM/ha (average 11.50 ton DM/ha) for undiluted cattle slurries, these had a higher dry matter yield than those of no fertilizer (9.21 ton DM/ha). Furthermore, separate application of early spring and summer (SA plots), separate application of early and late spring, and summer (SUA plots) fur undiluted cattle slurries, and whole application of spring (DS plots), separate application of early spring and summer (DSA plots), separate application of early and late spring, and summer (DSUA plots) for diluted cattle slurries were significantly (P<0.05) higher for annual dry matter yield than no fertilizer plots. Plots applied chemical fertilizer with nitrogen (N), phorphorus (P) and potassium (K) had 15.38 ton DM/ha annually, resulted in significantly (P<0.05) higher DM yield than chemical fertilizer containing P and K, and no fertilizer plots. Moreover, average annual DM yield for the chemical fertilizer with P and K was lower than that of cattle slurry applications. The efinciency of DM production for mineral nitrogen of chemical fertilizers was annually average 31.3 kg DM/kg N. In terms of cutting time of tall fescue, it was lowered in the order of 2nd growth followed by 1st and 3rd growth. However, efficiencies of annual DM production of nitrogen for diluted and undiluted cattle slurries were 26.1 and 15.3 kg DM/kg N, respectively, especially, highest in 2nd growth. While, efficiencies of DM production for cattle slurry versus for mineral nitrogen were 48.9 (undiluted) and 83.4% (diluted), respectively. For annual crude protein (CP) contents of tall fescue, aqueous cattle slurry applications showed 9,9 to 11.6%, which were significantly (P<0.05) higher than no fertilization (9.5%) and chemical fertilizer (9.0 to 9.8%), but annual average NDF and ADF contents were lowest in no fertilization. On the contrary, relative feed value (RFV) and total digestible nutrients (TDN) of no fertilizer plots were significantly (P<0.05) higher than the other plots. The application of cattle slurry and their dilution significantly increased yields of crude protein and total digestible nutrients compared with no and/or P and K fertilizers (P<0.05). These trends were much conspicuous in water-diluted cattle slurries applied in the early and late spring and summer, separately (DSUA plots).

  • https://doi.org/10.5333/KGFS.2007.27.1.009 인용 PDF KSCI

선진광학기술, 이론과 실습 동시에 익힌 뜻깊은 기회

  • 박종영
    • The Optical Journal
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    • v.11 no.5 s.63
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    • pp.65-69
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    • 1999

  • 한국광학기기협회가 '한$\cdot$일 광학산업 기술협력 사업'의 일환으로 주관한 일본 히다카(日高)광학연구소 연수를 통해 Focult Test, Null Test, Ronchi Test 등 다양한 렌즈 검사 방법과 비구면 렌즈 가공방법을 실습과 이론을 겸해서 익혔다. 우리 나라도 렌즈 가공, 검사 방법 등에 대한 실무와 이론체계를 확실히 정립해야 할 때임을 절실히 느낄 수 있는 기회였다.

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